[walied123]

hello every body;

i have the following problem..........please need help.

i want to write UDF for specific heat and electrical conductivity as a function of coordinates but there are two problems:

1- the fluent doesn't accept any udf for specific heat not function of Temperature.

2- in material panel there are no options for udf for the electrical conductivity.

are there any solutions for the above problems?

Regards

[beer]

Hi

Specific heat has an own udf name because it needs more information than the normal define material routines.

You can find the electrical conductivity under the uds part. It should be uds-0.


Edit: Found it:

The function for properties is DEFINE_PROPERTY(User_Property, c, t), for specific heat it's DEFINE_SPECIFIC_HEAT(User_Specific_Heat, T, Tref, h, yi). It's explained in the UDF manual.

[walied123]

hi peer;
thank you for your kind reply.

i know that for specific heat udf has a specified name but fluent accept a UDF for specific heat only as a function of temperature but in my case i need to define a UDF for specific heat as a function of sptial coordinates.

please can you help me in this problem?

[beer]

Oh yeah, sorry, it was late already when I replied.

Well the bad news is I think it is not possible. I wanted cp to depend on the pressure some while ago which didn't work. I made a request back then and the reply was that it's not possible and it maybe will be in the future. This must have been in 2012 or something. Obviously all you get is a temperature so there is no way to access any other information so as pressure or the coordinates like in your case.

Maybe ask the fluent support if there is a way but I don't think so.

[walied123]

thank you dear beer for your kind reply.